If it takes 30 seconds for a reactant concentration to decrease from 1.0 m to 0.5 m in a first-order chemical reaction, then what is the rate constant for the reaction? a. 0.033 s^–1 b. 0.046 s^–1 c. 0.023 s^–1 d. 43 s^–1

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.